This will dramatically reduce the records in "user_decisions" table which in turn will speed up the SQL operations on this table.

This improvement will affect various functions from the table structure of "user_decisions", the returned html and rest error report, the backend operation on saving report records and even the web service.

1. removed table field user_decisions.sequence_id
2. the sequenceID used in html and rest report is replaced by new format: lineNum_columnNum_checkID
3. do not save the initial error report and "no decision" answer, only save the "pass" and "fail" decisions.